PCB Trace Width Calculator

Calculate the required PCB trace width based on current, temperature rise, and copper weight. This calculator uses IPC-2221 standards for internal and external traces.

A
°C
mm
Trace Cross Section
Safety Margin

PCB Design Reference

Common Applications
Application Typical Current
Signal Lines < 0.5A
Power Supply 1-5A
High Power > 5A
Design Guidelines
  • Minimum trace width: 0.15mm (6 mil)
  • Standard signal trace: 0.25mm (10 mil)
  • Maximum temperature rise: 40°C
  • Keep high-current traces short
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